During Covid-19 situation here are some suggestions:
Limit UO Libraries search to ebooks.
Can request books from UO Libraries: they can be picked up or mailed to you
Chapters in UO books can be scanned and emailed to you.
Google books - Some books are available with preview options. May provided enough information, or provide information about what chapter you need.
Worldcat - Can search thousands of library catalogs.
For book and video material not owned by UO: This term: Summit has returned after a short hiatus. We can attempt Interlibrary Loan but be advised many libraries are not operating in "regular" mode so it may take longer to obtain material.
LibrarySearch offers a streamlined interface for finding books and other media that combines the collections of UO Libraries and Summit libraries.